Door lock



April 15, 1941.

A. F. MANTZ DOOR LOCK Filed O01; l, 1938 i in Patented Apr. 15, 1941UNITED 4 STATES f PATENT OFFICE Doon Loox Aloysius F. MantzfLos Angeles,Calif. Application october 1, 193s, serial No. 232,724

z claims. A(ci. 29e-.337)

My invention relates to a door lock and has for its principal objects,to provide a lock of relatively simple, practical and inexpensiveconstruction, further, to provide a lock having few parts capable ofbeing readily assembled and installed and further, to provide a lockthat is reversible in order that it may be applied to doors that aremounted to swing toward either the right or left hand.

A further object of my invention is, to provide a door lockcharacterized by the mounting ofthe latch in thedoor jamb rather than inthe door and the mounting of the keeper in the door instead of in thedoor jamb. This construction eliminates the possibility of the catchingand tearing of clothing on the latch or any projecting portion of thekeeper and, as the keeper is located in the jamb behind a shoulder it ispractically impossible to pick the lock by the insertion of a thinimplement or piece of material between the face of -the lock housing andthe jamb in which the latch is seated.

Further objects of my invention are, to providea lock that comprises fewparts and which can be installed without mortising of the door or thedisassembling of the lock and which lock may be reversed for use bysimply turning the lock end for end. y

a lock that is particularly applicable for the doors of bedrooms, bathrooms, dressing rooms, and the like, and the lock being of suchconstruction as to conveniently freceivea key actuated cylinder lockthat is used for releasing an internally arranged latching member fromthe outside of the door.

With the foregoing and other objects in View, my invention consists incertain novel features of construction and 'arrangement of parts thatwillbe hereinafter more fully described and claimed and illustrated inthe accompanying drawing in .whichz Fig. 1 is a View looking against theedge of a door to which my improved lock is applied.

Fig. 2 is an elevational view partly in section showing my improved lockapplied to a door and showing the latch housing that is embedded in thejamb in section.

Fig. 3 is an enlarged horizontal section taken on the line 3 3 of Fig.2.

Fig. 5 is a view looking against the face of the latch and latch housingthat are positioned in the door jamb. l

Fig. 6 is a sectional View showing a key operated cylinder lockpositioned in one of the door knobs.

Fig. 7 is an elevational view looking in the direction indicated by thearrow 'l in Fig. 6.

Referring by numerals to the accompanying drawings, l0, I0 designateescutcheon plates that are applied to the side faces of a conventionaldoor D directly over a horizontally disposed U- shaped opening or notchO that is formed in the edge of said door and which receives theoperating parts of the lockthat are positioned between the plates I0.

The escutcheon plates IIJ are rigidly secured to the door in positionover the opening O by means of a screw II that passes through one of theplates through the door and, the threaded end of the screw being seatedin a threaded collar I2 that, projects inwardly from the other one ofthe plates I0. This screw is located just beyond the inner end of theopening O.

The marginal portions of the escutcheon plates I0 are turned inwardly solas to form rounded anges I3, the edges of which bear against the facesof the door beyond the edge of opening O.

Detachably secured to the plates I0 and arranged between the endsthereof that are positioned adjacent the edge of the door are plates Ilthat are slightly narrower than said plates I0, so that they occupyspaced positions in the outer portion of opening O and the outer ends ofsaid plates coincide with the vertical edge of the door. The outervertical edges of these plates I4 are connected by a vertically disposedplate Ma.

The inner end portions of these plates I4 are bent outwardly to form fvertically disposed flanges I5 that bear against the inner faces ofplates IU and to hold the two sets of plates in assembled relation, earsor lips I6 that are formed on the front edges of plates I0 extendthrough slots I'I that are formed in the plates I 4 and, said lips beingbent into position so that they engage the inner faces of the plates I4(see Fie. 3).

Projecting inwardly from the intermediate portions of the'plates II),are short tubular members i8 that provide bearings for tubular'spindlesI9 and, secured to the-projecting outer ends of the outer one of theplates Ill.

said spindles I9 are thimbles 20, to each of which is rigidly xed a knob2 I.

Suitably secured to the inner end of each tubular spindle I9, is aneccentric 22 having diametrically opposite high end portions 23 andformed on the bottom of each eccentric is aA iiat surface 24. Formed inthe top of the eccentric that is carried by the tubular spindle thatcarries the knob 2l on the outside of the door, is a notch 25 that isadapted to receive the inner end of a latch lever 26, the latter beingpivotally mounted on the plate I that is applied to the inside of thedoor.

The outer end of this lever 26 carries a knob 21 that occupies aposition adjacent the right hand side of the knob 2| that is arranged onthe inside of the door and there is sucient friction in the -pivotalconnection between lever 26 and the plate I0 on which it is mounted, tomaintain the lever 26 in or out of engagement with the eccentric havingthe notch 25.

Formed in plate I4a that connects the outer ends of the plates I4 is anopening 28 and, secured to the inner face of plate I4a around theopening therein is an inwardly projecting housing 29. Arranged forhorizontal sliding movement in the housing 29 is a block 30 that iscarried by the outer end of a horizontally disposed plunger 3l and, thelatter extends through the inner end wall of the housing 29. f

Carried by the inner end of plunger 3l is a plate 32 that normallyengages against the nat surfaces 24 of the eccentrics 22 and, arrangedon the plunger and interposed between plate 32 and housing 29 is anexpansive coil spring 33 that yieldingly retains said plate 32 incontact with the ilat edges 24 of the eccentrics.

The door jamb J is provided with a shoulder S, against which the freeedge of the door engages when said door is closed and, seated in saidjamb between the shoulder S and the edge of the jamb is a housing 34 inwhich is arranged for sliding movement a latch 354 having a beveled face3S.' Arranged within the housing 34 to the rear of latch 35 is anexpansive coil spring 31 that normally forces the latch to its forwardlimit of movement within the housing 34 and, when so positioned theforward portion of said latch having the beveled surface 36 projectsbeyond the face of the lamb.

To install my improved lock, the entire structure enclosed and carriedby the pairs of plates I0 and I4 is inserted in opening O and screw ilis inserted through the inner ends of the plates *l I II and the door II`from the inside of the door, so that the threaded end of said screwengages An aperture is formed in the jamb J for the reception of housingI4 that carries latch 35.

When the door to which my improved lock is applied is closed, the outerend of plate i4 on the inside of the door will strike against beveledface 36 of latch 35, thereby moving said latch into housing 34 againstthe yielding resistance oil'ered by spring 31 and, when the door isfully closed and opening 28 aligns with latch 35 the latter will beforced outwardly by spring 31 through said opening 28 into the chamberwithin housing 29, thus securely holding the door in closed position.

Ii' the person inside the room provided with the door that has beenclosed as just described desires to lock the door, knob 21 is engagedand actuated so as to move the free end of lever 26 into notch ineccentric 22 and, as a result the Outside knob 2| can not be rotated ineither direction so as to open the door.

When it is desired to open the door from the inside, lever 26 isactuated so as to movefthe inner end thereof out of notch 25 and theknob on the inside of ,the door is now engaged and partially rotatedl ineither direction approximately a quarter turn. As a result of thismovement, the corresponding tubular spindle I9 is rotated and thecorresponding eccentric is moved so as to bring one or the other of thehigh end portions 23 against disc 32 so as to move the same outwardagainst the resistance offered by coil spring 33. As a result of thismovement, block is moved outward in housing 29 to engage and force latchoutwardly from the housing 29 through opening 28 into the latch housing34 and, as the end of said block passes the outer face of plate I4a thatconnects the plates I4, the door may be opened, whereupon latch 35 willbe moved outward to its limit of movement by spring 31 and, when theoperators hand is removed from the knob on the inside of the door,spring 33 will act to return block 30 and disc 32 to their normalpositions.

To open the door from the outside, it is only necessary to engage andpartially rotate the outer one of the knobs and thereby partially rotatethe corresponding eccentric 22 to move disc 32 and block 30 outwardlyand thereby move latch 35 into its housing.

In the construction illustrated in Figs. 6 and 7, a conventionalkey-controlled cylinder lock 46 is located in the knob on the outside ofthe door and, projecting from the inner end thereof into the lockhousing through the corresponding eccentric 22 is a stem di, the innerend of which carries a ilnger 42.

The insertion of the proper key in the lock I and the consequentrotation of stem 4I will swing nger d2 upward so as to disengage the endof the latching lever 26 from the notch in eccentric 22. Theconstruction just described enables an ordinary door latch to be changedinto a bath room or bedroom lock or into a key-controlled night latch.

Thus, it will be seen that I have provided a door lock that isrelatively simple in construction, inexpensive of manufacture and veryeiective in performing the functions for which it is intended.

The lock comprises few parts capable of being readily assembled or takenapart and the lock,

size, form and construction of the various parts of my improved doorlock, may be made and substituted for those herein shown and described,without departing from the spirit of my invention, the scope of which isset forth in the appended claims.

I claim as my invention:

l. In a latch for a door provided in its edge with a notch, a pair ofplates positioned on the side faces of the door and covering the notchtherein, a single fastening member passing that. 'is positioned withinlsaid channel-shaped member.

2. A iatehfor a door as set forth in claim 1 and with readily releasableinter-engaging connections 5 between the outer portions o! said platesand the side walls of said channel-shaped members.

ALoYsIUs F. MAN'rz.

